Program used to run tests: NetStumbler 0.4.0
For Mac users download:http://www.MacStumbler.com
5dBi Omnidirectional Antenna WiFi Test
13dBi Directional Cantenna WiFi Test
Results:
Cantenna: detected 22 signals with a SNR Peak of 46
Antenna: detected 10 signals with a SNR Peak of 38
note:
for better results the Cantenna performs better facing out a window. SNR peaked in the 80's